The Irish standard. [volume] (Minneapolis, Minn. ;) 1886-1920, 1887-05-14
SOME SCIENCE.

| SOmE SCtENSEs
| TIE condition of steel after being rolled,
remains unsettled for many hours. 1t
should not be subjected to any test until
It comes to a rest, in order to obtain its ex-
act quality.
The amount Of force exerted By heat and
! cold in expansion and contraction OF metal
! is equal to that which would be required to
| stretch or compress it to the same extent
| by mechanical means.
| A JOURNAL Of science admonishes drug
gists to be careful in the placing of globu-
lar glass jars in their windows where they
will be exposed to the suns rays, as there
IS danger OF fire being generated through
;heir acting as sun-glasses.
! FRENCH chemists have shown that water
passed through two hundred yards of gal
vanized iron pipe takes up 4.29 grains zinc
carbonate to the gallon Tanks of galvan-
| lied iron should, for this reason, never be
used for water for animal consumption.
A PLAN for the fertilization of the Afri-
can desert is afoot, and it is thought the
project will meet with success. A system
of artesian wells are being sunk for the
purpose of irrigation. Each we'll, it is
estimated, supplies nearly four thousand
! acres.
SOME scientists say that swallows
plunge into the mud of marshes, and hber-
nate like reptiles. What a feeling of deep
down gratitude would peryade this +Ameri-
can people were the English sparrow to
follow the example OF the sensible little
swallow, and remain underground until it
becomes fossil12ed thing of the past.
A Swiss invention is freezing mixture
in liquid form, which serves also as disin-
I fno C,,1r nd or,n Ri.
oxide, after being mixed and cooled, are
compressed into liquid and stored in
siphons, When liberated, they rapidly
evaporate with great reduction of temper
! allure. BY this means, animal and vegeta-
BILE tissues are rendered solid in few sec
| onds.
TEE inner bark of the locust tree, com
monty grown as an ornamental tree, has
been found to possess poisonous proper
| ties. It has long been known to possess
considerable of cathartic value, but not
until recently has q case of poisoning
through its use been given. A medical
Journal cites the case or cases Of over thir.
| ty children being severely poisoned by
chewing this bark.
IT is the opinion of scientists that, while
the form alton Of mother of-pearl is a natu-
raj process, the formation of pearls is the
result OF accident. This view has been
reached by noticing the circumstance that
when the shells are large and the inside
smooth, clean and without any holes, SO
that the mol!usks can fully develop, pearls
are but rarely found; while the form alton
of pearls is very frequent when the shells
are irregular.
THE workings Of the human heart have
been computed by celebrated physiolo-
| ,rse o,,1 ha 1oro Il f~of o1 hat 10
equal to the lifting Of 1875 tons in twenty
four hours. Presenting that the blood was
| thrown out Of the heart at each pulsatien
III the proportion of 60 strokes per minute
and at tie assumed force Of feet, the
mileage Of the blood through the body
! might be taken at 207 yards per minute,
miles per hour, 168 miles per day, 81. $40
miles per year, or $3.50, $50 miles in a life
time OF eighty-four years. The number Of
/ beats OF the heart in the same long life
would reach the total Of 2, 1853, nc, 600.
THB cause Of frequent boiler explosions
| is due, says scientific writer, to the fact
! that water can be heated beyond the boil
ing point and yet will not boil. Water, I'M
! der ordinary circumstances, will boil at 212
| deg. Fahrenheit, and will continue to boil
as long as any air remains in the boiler;
but the moment tho water is purged of its
air by long ebulition it becomes at rest,
and the steam gauge will not indicate any
further rise Of steam, as there is no further
pressure upon it. Now, rs the steam
gauge will not Indicate too much steam,
the engineer will naturally suppose every
thing all right He will then test the
| water in the boiler by pressing on the
| water-cock or any communication with the
boiler, when by doing so there is rush OF
! -. go >ko,I
water begins to boil. andas there is no pos
sible escape for the immense quantity Of
steam so suddenly created, the result is an
! exnioAiOn